Collect. Czech. Chem. Commun. 1981, 46, 963-974

Contribution to the analysis of liquid macroflow in a cylindrical vessel with a high speed impeller

Jaroslav Medeka and Ivan Fořtb

a Department of Chemical and Food Machinery, Technical University, 602 00 Brno
b Department of Chemical Engineering, Prague Institute of Chemical Technology, 166 28 Prague 6


In hitherto published studies the investigation of liquid macroflow in a vessel with an impeller has been concentrated mostly on the assessment of the volumetric flow rate through the impeller. Due to molecular and turbulent diffusion, however, significant exchange of mass and momentum occurs between this flow and the neighbouring charge. The extent of this induced volumetric flow rate has not been systematically investigated. This contribution attempts at the assessment of the induced, and total volumetric flow rate components in a vessel, in the plane of rotation of the lower edge of an impeller with flat inclined blades, in dependence on the blade number and the inclination angle between the blade and this plane.